Why should that bother you? It's research that describes something that occurs in a percentage of infants/children. If it doesn't describe you, congratulations, well done, be glad that you're happy and well-adjusted. So why does the fact that some people have a different outcome which suggests that a practice you did well in spite of might not be the best one apparently upset you so? It's like being pissed off about data showing that seatbelts increase the survivability of car accidents because you survived an accident without wearing one.